Automatic brake-block.



No. 654,809. Patented luly 3l, |900.

W. H. SAUVAGE. f

AUTOMATIC BRAKE BLOCK.

(Application led Nov. 13, 1899.)

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Uivrrr; STATES VPATENT Ormes.

WILLIAM HENRY SAUVAGE, OF DENVER, COLORADO, ASSIGNOR OF TWO- TI-IIRDS TO HENRY NEVTON WOOD AND CHARLES C. VELCII, OF SAME PLACE.

,- AUTOMATIC BRAKE-BLOCK.

sPncIFIcArIoN forming part of Letters Patent No. 654,809, dated my si, 1900'.

Application tiled November 13,` 1899. Serial No. 736 ,788. (No model.)

To @ZZ v7/tom it may concern: p Be it known that I, WILLIAM HENRY SAU- VAGE, a citizen of the United States of America, residing at Denver, in the county of Arapf ahoe and State of Colorado, have invented certain new and useful Improvements in Automatic Brake-Blocks; and I do declare' the following to be a full, clear, and exact description of' the invention, such as will enable others skilled in the art to which it apn pertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvement-s in automatic brake-blocks and it consists of the features hereinafter'described and claimed, all of which will be fully understood by reference to the accompanying drawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a vertical longitudinal section taken through my improved automatic brake-block, the parts being shown in the normal position. Fig. 2 is a similar section of the device, the parts being shown in the position whenthe brake is applied.v

Fig. 3 is a front viewf of the device with the parts in the position shown in Fig. 1. Fig. 4 is a rear view of the brake-shoe shown in de tail. Fig. 5 illustrates a toggle-link, two views beingfshown.

Similar reference characters indicating corresponding parts in these views, let the numeral 5 designate the brake-beam adapted to swing back and forth in proximity to the carwheel. (Not shown.) To this brake-beam is secured, by means of a bolt 6, the head 7, the bolt being passed through coinciding apertures formed in the beam and a rearward projection '7ab of the head. The front face of the head is provided with a groove 8. Extending rearwardly from this groove is a curved recess which forms a bearing for the rear extremity of a toggle-link 9, which is held in place by a bolt 10,passe'd transversely through registering apertures formed in the head and the link extremity. The rear extremity of the link is curved to fit the bearing in the head. The forward extremity of the link is 5o also curved to fit a counterpart recess 12,

formed in the rear side of the shoe 13. The

link extremity is connected with the shoe by passing a pin let through registering openings formed in lugs 13 and the forward extremity of tlie link. The lugs 13a project rearwardly from the rear side of the shoe and are located on opposite sides of the recess 1 2;

In the upperpart of the groove 8 of the head, which is properly shaped for the purpose, is located a stop-cushion 15, supported in any suitable manner. formed at the upper extremity of the groove prevents the cushion from moving bodily up-v wardly when engaged bythe toggle-link when the shoe reaches its upward limit of movement.

Each extremity of the head 7 is provided with an inclined face 7 c, which engages an inclined face 13, formed on the rear side of the shoe, the said faces being arranged to throw the shoe outward toward the wheel of the ear as the shoe is moved upwardly.

The operation of my improved brake-block is as follows: Assuming that the parts are in the position shown in Fig. 1, the brake-beam is moved forwardA suiciently to bring the front face of the shoein contact with the tread of the car-wheel. As soon as this occurs the friction between the wheel turning in the direction indicated by the arrows in Figs. 1 and 2 and the shoe raises the latter, and as it moves upwardly the toggle-link cooperates with the inclined faces 13c and 7c of the shoe and the head to force the shoe outwardly against the tread of the wheel, setting the brake. The stop-cushion 15, engaging the link, limits the upward movement of the shoe. This cushion may be composed of rubber or other suitable yielding material.

Having thus described my invention, whatv I claim is- 1. An automatic brake-shoe composed of two members, namely, a head and a shoe movable thereon, the two members being provided with cooperating inclined engaging faces located at each extremity and simultaneously active during the brake applying operation.

2. A brake-block composed of two members, namely, a head and a shoe movable thereon, the two members being provided with coperating inclined engaging faces located at each A horizontal shoulder extremity and an intermediate toggle connection substantially as described.

3; A brake-block composed of a head and a shoe movable thereon and provided With inclined engaging faces, the head being groove'd on its front face, and a toggle-link located in said groove and connecting the head'and the shoe in operative relation.

4. A brake-block composed of a head and a shoe movable thereon, the head being grooved on its front face, and a centrally-located tog- 

